Depending on the processed material from each drill must be properly sharpened. To verify the correct angle will help a specially prepared square plate of copper or aluminium with a thickness of 1 mm.
To become operational protractor enough to cut it cut, as shown in the picture: a large cutout at an angle of 120 degrees, the other half is 60 degrees and the surviving corner of a square is 90.
Recommend to read
“PAPAKHA” FOR THE WELL
A well still has no less significance today than before, especially given the popularity of dacha and cottage construction. No tap water, even passed through modern filters, can compare to...
All-terrain vehicle “BRODAGA-YUGRA”
The history of the creation of the all-terrain vehicle is quite long. First, I began to adapt the Niva-2121 for movement on our off-road terrain - I installed it on the largest wheels from...
